Emergency operations locality director Paul Mudd said: “The strike action involved less than 10 per cent of the total staff employed by the trust and the vast majority of our staff have been working as normal.”

The union balloted members last month after YAS bosses decided they would no longer recognise Unite during negotiations.

It followed union claims that plans to save £46m over five years by bringing in semi-skilled care assistants to work alongside paramedics would put patients at risk.